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{{Note|1='''bcMeter (DIY)''' — This page documents the bill of materials for the source-available bcMeter (DIY) — the Raspberry-Pi-based design, freely available for private, educational and research use (CC BY-NC 4.0). The assembled bcMeter instruments use a different PCB design.}}
== Overview of Parts (bcMeter DIY) ==
[[File:bcMeter_parts.jpg|thumb|none|800px]]
== Mandatory Components ==
# '''bcMeter Pi Hat''' — Order prepopulated (~95 EUR) or build your own from PCB + components (~5 EUR per PCB for 10+ on JLCPCB or similar)
# '''Raspberry Pi 3A or Zero 2 W''' (~35 EUR)
# '''MicroSD Card''' (~10 EUR)
# '''Power Supply 5.25V/2A''' (~15 EUR)
# '''Air Pump''' (~10–200 EUR depending on type)
''Prefer not to source parts? bcMeter Kit/Complete available on request — contact jd@bcmeter.org.''
== 3D Printed Case ==
STL files for 3D Printing (SLA or FDM): [https://github.com/dahljo/bcmeter/tree/main/stl GitHub repository] — printing material ~10 EUR.
Use black filament/resin. FDM is prone to leakage if not properly configured. If possible, mix resin with flex resin.
== Filter Paper ==
== Filter Paper ==
Pallflex T60A20 Filter Paper was used during developement and is sadly discontinued. We're testing https://www.amazon.com/7194-Non-Heat-Pallflex-Tissuquartz-Laboratory/dp/B0731SG18R. <br>
You may send us a sample of your filter paper and we happily calibrate bcMeter with it!


== Bill of Material for general purpose PCB (THT components & 12V DC Barrel Jack) ==
AE33 filter paper is standard for bcMeter. Any filter paper with a known scattering factor can be used. See [[Best practices#Supported Filter Papers|Supported Filter Papers]] for correction factors.
 
Send a sample of your filter paper to jd@bcmeter.org for calibration.


=== [https://www.mouser.de/ProjectManager/ProjectDetail.aspx?AccessID=0f6a28fa20 '''Link to mouser basket'''] '''for one-click-order''' contains the following parts: ===
== Additional Material (~75 EUR) ==


{| class="wikitable sortable"
{| class="wikitable"
|+ bcMeter Bill of Materials
! Description !! Quantity !! Approx. Price
| align="center" style="background:#f0f0f0;"|'''Mfr. No'''
| align="center" style="background:#f0f0f0;"|'''Manufacturer'''
| align="center" style="background:#f0f0f0;"|'''Description'''
| align="center" style="background:#f0f0f0;"|'''Order Qty.'''
| align="center" style="background:#f0f0f0;"|'''Price (EUR)'''
| align="center" style="background:#f0f0f0;"|'''Ext.: (EUR)'''
|-
|-
| 110991027||Seeed Studio||Development Boards & Kits - ARM Seeed Rasp Pi Zero W Barebones Kit||1||21,48 €||21,48 €
| 22 AWG Wire || 1 || $10
|-
|-
| MCP3426A6-E/MS||Microchip||Analog to Digital Converters - ADC 16bit deltasigma ADC dual channel 15sps||1||2,35 €||2,35 €
| Hot Glue || 1 || $7
|-
|-
| IRL 81A||Osram Opto Semiconductor||Infrared Emitters Infrared 850nm Half Angle +/-12DEG||2||0,881 €||1,76 €
| Rubber Band (SHORE A) for sealing || 1 || $13
|-
|-
| LPT 80A||Osram Opto Semiconductor||Standard LEDs - SMD PHOTOTRANSISTOR||2||0,762 €||1,52 €
| Silicone Hose (5mm ID) || 1 || $5
|-
|-
| RCER72A103K0K1H03B||Murata||Multilayer Ceramic Capacitors MLCC - Leaded 0.01uF 100volts X7R LS=5mm +/-10%||3||0,474 €||1,42 €
| M3 Screws || 1 set || $7
|-
|-
| TAP334M035SCS||AVX||Tantalum Capacitors - Solid Leaded 35V 0.33uF 20% ESR=1 5 Ohm||2||0,551 €||1,10 €
| M3 Threaded Inserts || 1 set || $7
|-
|-
| CON-SOCJ-2155||Gravitech||DC Power Connectors Power Jack/Connector 2.1mm x 5.5mm||1||1,01 €||1,01 €
| MicroSD Card 16GB || 1 || $8
|-
| K102K15X7RF53H5G||Vishay||Multilayer Ceramic Capacitors MLCC - Leaded 50V 1nF 10% X7R e3 Auto||3||0,313 €||0,94 €
|-
| RDEC71E106K2M1H03A||Murata||Multilayer Ceramic Capacitors MLCC - Leaded 10uF 25volts X7S 10%||1||0,864 €||0,86 €
|-
| RDER71E104K0M1H03A||Murata||Multilayer Ceramic Capacitors MLCC - Leaded 0.1uF 25volts X7R 10 %||2||0,398 €||0,80 €
|-
| L7805CV||STMicroelectronics||Linear Voltage Regulators 5.0V 1.0A Positive||1||0,567 €||0,57 €
|-
| L7809CV||STMicroelectronics||Linear Voltage Regulators 9.0V 1.0A Positive||1||0,415 €||0,42 €
|-
| MMBT3904-G||Comchip Technology||Bipolar Transistors - BJT VCEO=40V IC=200mA||1||0,186 €||0,19 €
|-
| MBA02040C2261FC100||Vishay||Metal Film Resistors - Through Hole .4watt 2.26Kohms 1% 1/8watt body size||2||0,093 €||0,19 €
|-
| CFR25SJT-26-10K||YAGEO||Carbon Film Resistors - Through Hole 10 kOhms 250 mW 5% - 350/ +500 PPM / C||1||0,085 €||0,09 €
|-
| OM1015E-R58||Ohmite||Carbon Film Resistors - Through Hole 100 Ohm 1W 5% 500 Vo lt||1||0,085 €||0,09 €
|-
| ||||||||||
|-
| ||||||||||34,79
|-
|
|}
|}


== Bill of Material for the small PCB incl. optional Honeywell Airflow Meter ==
== Key PCB Components ==
[https://www.mouser.de/ProjectManager/ProjectDetail.aspx?AccessID=444c11fc4d Mouser Basket - incl. Aiflow Meter - this is optional. Delete this item, if not wanted or needed. ]
 
{| class="wikitable"
{| class="wikitable"
! Mfr. No !! Manufacturer !! Description !! Order Qty. !! Price (EUR) !! Ext.: (EUR)
! Component !! Description !! Approx. Price
|-
| C0805C104K5RAC7411 || KEMET || Multilayer Ceramic Capacitors MLCC - SMD/SMT 50V 0.1uF X7R 0805 10% || 2 || 0,11 € || 0,22 €
|-
| 885382207006 || Wurth Elektronik || Multilayer Ceramic Capacitors MLCC - SMD/SMT WCAP-CSST 0805 10nF 10% 50VDC || 3 || 0,085 € || 0,26 €
|-
| 885382207004 || Wurth Elektronik || Multilayer Ceramic Capacitors MLCC - SMD/SMT WCAP-CSST 0805 1nF 10% 50VDC || 3 || 0,085 € || 0,26 €
|-
| IRL 81A || Osram Opto Semiconductor || Infrared Emitters Infrared 850nm Half Angle +/-12DEG || 2 || 0,881 € || 1,76 €
|-
|-
| LPT 80A || Osram Opto Semiconductor || Standard LEDs - SMD PHOTOTRANSISTOR || 2 || 0,762 € || 1,52 €
| '''U1''' MCP3428 || 4-Channel ADC || €6
|-
|-
| 110991027 || Seeed Studio || Development Boards & Kits - ARM Seeed Rasp Pi Zero W Barebones Kit || 1 || 21,48 € || 21,48 €
| '''D1/D2''' IRL81A || IR LEDs (880nm) || €2
|-
|-
| 2222 || Adafruit || Adafruit Accessories GPIO Header for Raspberry Pi A+/B+/Pi 2/Pi 3/Pi 4/Zero - 2x20 Female Header || 1 || 1,27 € || 1,27 €
| '''J1''' Omron D6F || Airflow Sensor || €50
|-
|-
| ''HAFBLF0750CAAX5'' || ''Honeywell'' || !'''OPTIONAL'''! ''Flow Sensors 750 sccm,Long Port Analog,Fast Mt, 5V'' || ''1'' || ''87,99 €'' || ''87,99 €''
| '''U2''' LM1117 || Voltage Regulator || €1
|-
|-
| MMBT3904_R2_00001 || Panjit || Bipolar Transistors - BJT /S1A/TR/13"/HF/12K/SOT-23/TRA/SOT/GPT-03TN/GPT03-QI15/PJ/// || 1 || 0,093 € || 0,09 €
| '''U3''' SHT4x || Humidity/Temp Sensor || €4
|-
|-
| MCP3426A2-E/MS || Microchip || Analog to Digital Converters - ADC 16bit deltasigma ADC dual channel 15sps || 1 || 2,35 € || 2,35 €
| '''Pump''' D15S PWM || Membrane Pump || €95
|-
|-
| CRCW08052K21FKEAC || Vishay || Thick Film Resistors - SMD 1/8Watt 2.21Kohms 1% Commercial Use || 2 || 0,136 € || 0,27 €
| Capacitors, resistors, connectors || Various || ~€20
|-
| RCG0805100RJNEA || Vishay || Thick Film Resistors - SMD .125watt 100ohms 5% 0805 200ppm || 1 || 0,085 € || 0,09 €
|-
| CRCW080510K0FKEAC || Vishay || Thick Film Resistors - SMD 1/8Watt 10Kohms 1% C ommercial Use || 1 || 0,085 € || 0,09 €
|-
|  ||  ||  ||  ||  ||
|-
|  ||  ||  ||  ||  ||
|-
|  ||  ||  ||  || Merchandise: || 117,65 €
|-
|  ||  ||  ||  || Delivery Charge: || 0,00 €
|-
|  ||  ||  ||  || Back-order Delivery: || 0,00 €
|}
|}


== Amazon Links for additional Material ==  
Full BOM with exact product numbers available at [https://github.com/dahljo/bcmeter GitHub].
 
== PCB / Gerber Files ==


{| {{table}}
Gerber files for PCB fabrication: [https://github.com/dahljo/bcmeter/tree/main/gerbers GitHub]
| align="center" style="background:#f0f0f0;"|'''Description'''
 
| align="center" style="background:#f0f0f0;"|'''Quantity'''
Two PCB variants exist:
| align="center" style="background:#f0f0f0;"|'''Price'''
* '''SMD PCB''' — For 5V and smaller pumps. More compact, recommended.
| align="center" style="background:#f0f0f0;"|'''Link'''
* '''THT PCB''' — For 12V and larger pumps. Easier to assemble but less accurate.
|-
 
| 22AWG Wire||1||$9.99 ||https://www.amazon.com/NorthPada-Electronic-Electrical-Tinned-Voltage/dp/B08979VWP5/ref=sr_1_15?dchild=1&keywords=22+awg+wire&qid=1626014422&sr=8-15
== Assembled instruments (Kit/Complete) ==
|-
 
| Hot Glue||1||$6.99||https://www.amazon.com/Baffo-Adhesive-Project-Craftwork-Diameter/dp/B07XC3VJRH/ref=sr_1_8?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=hot+glue+black+sticks&qid=1626014378&refresh=1&sr=8-8
The assembled bcMeter instruments use a different hardware design:
|-
 
| Rubber Band||1||$12.95||https://www.amazon.com/Neoprene-Rubber-Black-Self-Adhesive-Sponge/dp/B00EE9HTPW/ref=sr_1_10?dchild=1&keywords=Rubber+Shore+A+tape&qid=1626014507&sr=8-10
* '''ADS1220''' 24-bit ADC (replaces MCP3428)
|-
* '''Integrated microcontroller''' (instead of the Raspberry Pi used in the DIY build)
| Silicone Hose||1||$3.99||https://www.amazon.com/Silicone-Vacuum-Hose-Performance-Black/dp/B07792YB15/ref=sr_1_14?dchild=1&keywords=silicone+hose+5mm&qid=1626014620&sr=8-14
* '''Internal flash storage''' (replaces microSD)
|-
* '''Optional:''' SIM7080G LTE-M modem, AT6668 GPS, SPS30 PM sensor
| m3 Threads||1||$12.59||https://www.amazon.com/iplusmile-Embedment-Threaded-Printing-Projects/dp/B087NBYF65/ref=sr_1_43?dchild=1&keywords=m3+screw+threads&qid=1626014698&sr=8-43
|-
| M3 Phillips Screw||1||$7.29||https://www.amazon.com/uxcell-Stainless-Phillips-Machine-Combine/dp/B07P3ZJN2K/ref=sr_1_18?dchild=1&keywords=m3+screws+8mm&qid=1626014873&sr=8-18
|-
| M3x8mm Hex Screws||1||$8.49||https://www.amazon.com/uxcell-M3x8mm-Thread-Button-Socket/dp/B01B1OD62C/ref=sr_1_3?dchild=1&keywords=m3+screws+8mm&qid=1626014812&sr=8-3
|-
| SanDisk 16GB 3-Pack||1||$17.48||https://www.amazon.com/SanDisk-3-Pack-microSDHC-Memory-3x16GB/dp/B089DPCJS1/ref=sr_1_11?dchild=1&keywords=microSD+Card&qid=1626014929&refinements=p_36%3A1253503011&rnid=386442011&s=pc&sr=1-11
|-
|
|}


Pallflex T60A20 Filter Paper was used during developement and is sadly discontinued. We're testing
For current device information, see [[Introduction]].
https://www.amazon.com/7194-Non-Heat-Pallflex-Tissuquartz-Laboratory/dp/B0731SG18R

Latest revision as of 01:45, 1 August 2026

Template:Note

Overview of Parts (bcMeter DIY)

Mandatory Components

  1. bcMeter Pi Hat — Order prepopulated (~95 EUR) or build your own from PCB + components (~5 EUR per PCB for 10+ on JLCPCB or similar)
  2. Raspberry Pi 3A or Zero 2 W (~35 EUR)
  3. MicroSD Card (~10 EUR)
  4. Power Supply 5.25V/2A (~15 EUR)
  5. Air Pump (~10–200 EUR depending on type)

Prefer not to source parts? bcMeter Kit/Complete available on request — contact jd@bcmeter.org.

3D Printed Case

STL files for 3D Printing (SLA or FDM): GitHub repository — printing material ~10 EUR.

Use black filament/resin. FDM is prone to leakage if not properly configured. If possible, mix resin with flex resin.

Filter Paper

AE33 filter paper is standard for bcMeter. Any filter paper with a known scattering factor can be used. See Supported Filter Papers for correction factors.

Send a sample of your filter paper to jd@bcmeter.org for calibration.

Additional Material (~75 EUR)

Description Quantity Approx. Price
22 AWG Wire 1 $10
Hot Glue 1 $7
Rubber Band (SHORE A) for sealing 1 $13
Silicone Hose (5mm ID) 1 $5
M3 Screws 1 set $7
M3 Threaded Inserts 1 set $7
MicroSD Card 16GB 1 $8

Key PCB Components

Component Description Approx. Price
U1 MCP3428 4-Channel ADC €6
D1/D2 IRL81A IR LEDs (880nm) €2
J1 Omron D6F Airflow Sensor €50
U2 LM1117 Voltage Regulator €1
U3 SHT4x Humidity/Temp Sensor €4
Pump D15S PWM Membrane Pump €95
Capacitors, resistors, connectors Various ~€20

Full BOM with exact product numbers available at GitHub.

PCB / Gerber Files

Gerber files for PCB fabrication: GitHub

Two PCB variants exist:

  • SMD PCB — For 5V and smaller pumps. More compact, recommended.
  • THT PCB — For 12V and larger pumps. Easier to assemble but less accurate.

Assembled instruments (Kit/Complete)

The assembled bcMeter instruments use a different hardware design:

  • ADS1220 24-bit ADC (replaces MCP3428)
  • Integrated microcontroller (instead of the Raspberry Pi used in the DIY build)
  • Internal flash storage (replaces microSD)
  • Optional: SIM7080G LTE-M modem, AT6668 GPS, SPS30 PM sensor

For current device information, see Introduction.

Retrieved from "https://bcmeter.org/wiki/index.php?title=Bill_of_material&oldid=432"